How long is too long for a 485 application?

[fulash]

Hi,

My priority is current, my 485 was filed in March 2016, the current processing times page says that on October 31, 2016 USCIS was processing cases filed in June 2016. I chatted with my attorney, he says nothing can be done, USCIS can take as long as they please; submitting an inquiry will result in a template response which wont be helpful, and will also trigger a vindictive RFE which will delay my case further; 

 

Am I really 100% on the mercy of the USCIS? Can they take years and years without being answerable? Can anyone tell me if my attorney is telling me the truth?

[JoeF]

Inquiring won't trigger an RFE.